Electric-arc lamp.



PAIENTED JULY 30, 1907.

H. J. J. JABURG, .111.

ELECTRIC ARC LAMP.

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s Ps'rns w, wunmarom'nm HENDEIGUS JOHANNES :IAOOBUS JABURG, JR, OF AMSTERDAM, NETHERLANDS.

ELECTRIC-ARC LAMP.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed December 31, 1906. Serial 110. 350,143.

To all whom il, may concern: l

Be it known that. I, I'IENDRTCUS .TonANNns .IACOBUS JABURG, .lr., a subject of the Queen of the Netherlands, residing at Keizersgracht No. 541, Amsterdam, Kingdom of the Netherlands, have invented certain new and useful Improvements in Electricolrc Lamps, of which the following is a. specification.

My invention relates to imPIOVOD'IODtS in electric arc lamps and particularly to that type of lamp in which the electrodes are disposed at a relative incli iation to each other and which furthermore are adapted to be used in connection with either continuous or alternating currents.

One of the objects of this invention is the provision of means tor positively and automatically regulating the feed of the electrode.

Another object of the invention is to prevent any sudden shocking or jarring of the electrodes.

Still another obj ect contemplated by this invention is to insure frictional engagement of the terminals of the electrodes, thus preventing ashes adhering to the same.

To the accomplishment of the recited objects and others subordinate thereto, the preferred embodiment of the invention resides in that construction and arrangement of parts hereinafter described. illustrated in the accompanying drawings, and embraced within the scope of the appended claims.

The drawing represents a longitudinal section through an apparatus embodying my invention.

The numeral 1 designates the well known top plate upon which the guide rod 2 and regulating mechanism which is to be hereinafter described are arranged. The are light electrodes 3 and 4 are respectively mounted upon holders 55 which are adapted to slide vertically on the guide rod 2. To the top plate 1 are moreover connected two bearing rods 6, to the terminals oi which is secured a supporting plate 7 which is provided with the usual ring S for holding the glass cylinder or economizer 9. The lower end of the left hand guide rod is fixed on a contact plate 15 which is arranged on the supporting plate 7 the right hand guide rod two of which being illustrated are adapted to be directly connected to the supporting plate 7. This last mentioned connection has been eliminated from the drawing in order that the electrode the regulating devices and their co-relative parts may be observed more clearly in said drawings. The electrode 3 projects through an opening, as at 10 and the electrode 4 extends through an elongated opening as at 11, both of said openings for the respective electrodes being in the plate 7. The lower end of the electrode 3 rests, as usual, upon a supporting surface 12 which is made of any suitable refractory material and connected to the plate 7.

The carbon holder 5 of the electrode 3 is provided with a laterally extending bar .13 and the carbon holder of the electrode 4 is suspended on said bar by means of an eye. It will be noted that the eye is of considerable larger diameter than the diameter-of the laterally extending bar 13, the function of which will be hereinafter described.

It is evident from the foregoing description that the lateral bar 13 will descend with the electrode 3 and owing to its connection with the holder 5 oi the electrode '1 will cause the latter to also descend so that both of said electrodes will be uniformly and gradually consumed. On the under side of plate 1 is arranged a solenoid or electro magnet 14 the core 16 of which is hollow and contains a spiral spring 17, having one end connect ed with the top thereof in any suitable manner and having its other end connected to the rod 18 which is guided in brackets 19 and 20 connected to a ioot plate 21, the latter in its normal position resting on the supporting plate 7. When the core 17 of the solenoid 14 is made to assume its lowest position as shown in the drawing. this ioot plate 21 completely covers the elongated aperture ll of the supporting plate 17 and in this position has moved the carbon 4 to the right, that is to say away from the supported carbon 3, this being the normal position when the lamp burns.

To one side of the electro magnet 14 is arranged a magnetic cut out 22, the core 23 of which is provided with a contact stud 24 and a strap 25, the latter having a contact 26. On the top of the plate 1 are located two terminals 27 and 28 and at any desirable place within or without the lamp is arranged a supplementary resistance 29. The wire connections between the various parts of the lamps are arranged as follows:The

.left hand guide rod 2 is connected to the terminal 27 and its contact plate to one end of the supplementary resistance, the upper end of which is connected to the electromagnet 14. From the terminal 28 a rod 30 is arranged downward and connected by a wire with a magnetic cut out and by means oi another wire to the contact stud 24 of the core 23 oi the magnetic cut out 22. A rod 31 is connected to the bottom of the top plate 1 and the upper end of said rod is connected to the winding coil of the magnetic cut out and the lower end is connected by means of a hanging wire with a carbon holder 5 of the movable carbon 4.

When the lamp burns, the electrodes and all other parts of the lamp assume the positions shown in the drawing. If the circuit is cut out, the carbons remain in this position, but the core 23 of the magnetic cut out will then descend so that the contact stud 24 comes to rest on the contact 26. To make the lamp burn, the current is taken in through terminal 27 by the rod 2, contact plate 15 and supplementary resistance 29, the electro magnet 14 the contact 26, the contact stud 24 and the rod 30, to the terminal 28. When the electro magnet 14 is energized the core 16 of the same will raise the rod 18 with its foot plate 21 and by so doing will cause the electrode 4 to move towards the supported electrode 3 and thus induce the formation of an arc. The current will then pass directly to the movable electrode 4 and from the holder 5 of the same over the rod 31 to the winding coil of the magnetic cut out, and over this coil by the rod 30 to the terminal 27. I11 passing through the winding coil of the magnetic cut out, the current will attract the core 23 of the same, whereby the contact 2426 is interrupted, with the result that the electro-magnet 14 as well as the supplementary resistance are denergized. The core 16 of the electro magnet is then no longer attracted and will consequently gravitate so that the foot plate 21 closes the aperture 11 and by so doing shuts off the interior of the lamp from the burning ends of the electrode. It will thus be seen that the movement of the core 16 which takes place at the beginning of the burning of the lamp causes the movable electrode to move towards and from the supported one and as the movable one has a slight movement in the direction of the length ofthe carbon 4 and independent of the rod 13 and carbon 3 owing to the fact that the eye carried by the support 5 is considerably larger than the diameter of the bar 13 as hereinbeiore recited, the points of the carbons are rubbed against each other. This initial frictional engagement of the lower terminals of the electrodes wipes the ashes oft and obtains a perfect contact of the electrodes. It is also obvious when using an alternating current, owing particularly to the fact that the electro magnet 14 is'deenergized when the arc lamp is burning that humming or jarring of the lamp is prevented.

What I claim is:

1. An electric arc lamp comprising a supported electrode and a movable electrode, a holder for the supported electrode, a bar rigidly connected to and extending from said holder, a holder for said movable electrode, said last mentioned holder having an eye loosely mounted on the bar of the holder, and guide rods for each of the holders.

An electric arc lamp comprising a supported electrode and a movable electrode, a holder for the supported electrode, a bar rigidly connected to and extending from said holder, a holder for said movable electrode, and means connecting said bar and holder for permitting a lateral and longitudinal movement of the movable electrode.

3. An electric arc lamp comprising a stationary support ing plate having a pair of openings, one of said openings being elongated, a supported electrode extending through the smaller of said openings, an apertured footplate mounted upon the supporting plate for closing the elongated opening therein, a movable electrode extending through said foot-plate and elongated opening, a holder tor the supported electrode, a bar rigidly connected to and extending from said holder, a holder for said movable electrode, said last mentioned holder having an eye loosely mounted on the bar of the holder, a rod connected to said foot plate and extending in substantially the same direction as the movable electrode and provided with means for moving it in such direction, and guide rods for each of the holders.

4. An electric arc lamp comprising a stationary supporting plate having a pair of openings,,one of said openings being elongated, a supported electrode extending through the smaller of said openings, an apertured footplate mounted upon the supporting plate for closing the elongated opening therein, a movable electrode extending through said toot-plate and elongated opening, a holder for the supported electrode, a bar rigidly connected to and extending from said holder, a holder for said movable electrode, the latter having an eye loosely mounted on the bar of the other holder to permit of a lateral and longitudinal movement of the movable electrode, and a rod connected to said foot plate and extending in substantially the same direction as the movable electrode and provided with means for moving it in such direction.

An electric arc lamp comprising a stationary supporting plate having a pair of openings, one of said openings being elongated, a supported electrode extending through the smaller of said openings and closely fitting the same, an apertured foot-plate mounted upon the supporting plate closing the elongated opening therein, a rod having one terminal secured to said foot-plate and extending in substantially the same direction as the movable elec being elongated, a supported electrode extending through the smaller of said openings and closely fitting the same, an apertured foot-plate mounted upon the supporting plate for closing the elongated opening therein, a movable electrode extending through said foobplate and elongated opening, means for causing an initial frictional engagement of the terminals of said electrodes, said means comprising a rod having one terminal secured to said footplate and extending in substantially the same direction as the movable electrode, an electro magnet for moving the rod in such direction, a hollmvcore therefor, a spring within said core and connected to the other terminal of said rod, a bar rigidly connected to and extending from the holder of said supported electrode, the holder of said movable electrode having an eye loosely mounted on the bar of the other holder, and guide-rods for each of said holders.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HENDRICUS .TOIIANNES JACOBUS .TABURG, JR.

Witnesses:

THOMAS ULSMANN VnnrL-WE, Anonsrr Srnonnrno Bonus. 

